Malicious PDF — malware analysis report

Static analysis result for SHA-256 711997484804c03d…

MALICIOUS

PDF

43.8 KB Created: 2020-08-18 19:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c31634a2b760d1d1d758f74ec1d33b4a SHA-1: 6d72dd633603336fbb8908d8341325e2a9f20dcc SHA-256: 711997484804c03d302a92cf22135e5d0edadd934b909d582794cd4086f4c206
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=zcoin+masternode+setup+guide'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are benign Shopify URLs but others point to unknown domains. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the embedded links and redirector suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=zcoin+masternode+setup+guide
    • http://sipaguw.zjchrome.net/uploads/1/3/1/6/131637814/4203359.pdf
    • http://files.datingsitesforbikers.com/uploads/1/3/1/4/131407459/8152536.pdf
    • http://files.intheblinkofaneyejewelry.com/uploads/1/3/0/9/130969705/wufusowujama-ketubedobi-mikibewuwab-jipibuvimitunug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/rusodobawetibulod.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/adjectif_possessif_francais.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/79706461794.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/wirevawusikorojidunos.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/29393482793.pdf
    • https://cdn.shopify.com/s/files/1/0430/7514/1783/files/java_programming_array_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/0728/7197/files/46847096602.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8285/files/25090841351.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/cbp_officer_exam.pdf
    • https://cdn.shopify.com/s/files/1/0436/4461/6864/files/because_vs_because_of_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0440/5529/8213/files/40452539119.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15906675896.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/nevesudi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/boney_m_christmas_songs_320kbps.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c4f.bin
82a6c3e0b5acbe8273b480ad558c0f605903bc301faf242d46287424a44b4132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4F 5320 bytes
font_01_sfnt_off00007e3e.bin
c9bd02cd94ed840e6c73c885360bd2448b390a82a844d04ee35425ef3507108f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3E 10596 bytes

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